js小练习

1.题目：某班的成绩出来了，现在老师要把班级的成绩打印出来。

效果如下：xxx年xx月x日星期x--班级总分为：81

格式要求：1.显示打印的日期。格式为类似“xxxx年xx月xx日星期x”的当前的时间。

2.计算出该班级的平均分（保留整数）。

同学成绩数据如下： "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76"

代码：

<!DOCTYPE HTML>
<html>
   <head>
       <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
       <title></title>
       <script text="javascript">

           var weekDay = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"];
           var date = new Date();
           //alert(date.getFullYear()); 2017
           //alert(date.getMonth()+1); 5
           //alert(date.getDate()); 26
           //alert(date.getDay()); 5
           //alert(weekDay[date.getDay()-1]); Friday

           var scoreStr = "Ming:87; Hua:81; Hong:97; Tian:76; Zhang:74; Li:94; Xi:90; Wu:76; Di:64; Man:76";
           var nameArr = scoreStr.split(";");
           var scoreSum = 0;
           //alert(scoreArr.length); 10
           for(var i=0; i<nameArr.length; i++){
               var scoreArr = nameArr[i].split(":");
               scoreSum = scoreSum + parseInt(scoreArr[1]);
           }

           var scoreAvg = scoreSum/nameArr.length;
           document.write(date.getFullYear() + "." + parseInt(date.getMonth()+1) + "." + date.getDate() + " ");
           document.write(weekDay[date.getDay()-1] + "<br />");
           document.write("The total score is " + scoreSum + "<br />");
           document.write("The average score is " + scoreAvg);

       </script>
   </head>
   <body></body>
</html>

结果：

2017.5.26 Friday
The total score is 815
The average score is 81.5

注意：split、join和parseInt函数的使用

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